Lock.



J. H. SHAW.

I LOCK. APPLICATION FILED JAN. 29, I9I2.

1,167,529.; Patented Jan. 11, 1916.

T 2 SHEETS-SHEET I.

WITNESSES: ZNVENTOR. Giza/6M w 1 SW ATTORNEYS.

J. H. SHAW.

LOCK.

APPLICATION FILED JAN. 29,1912. 1,167,529, Patented Jan. 11, 1916.

- 2 SHEETS-SHEET 2- WITNESSES: INVENTOR.

ATTORNEYJ.

COLUMBIA PLANOCIRAPH C0.,w,\smNGToN, D. c.

E ATES PAEN F.

JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPOR-ATION'OF CONNECTICUT.

LOCK.

To all whom it may concern:

Be it known that I, JOHN H. SHAW, a citizen of the United States, and a resident of the city and county of New Haven and State of Connecticut, have invented new and useful Improvements in Locks, of which the following is a specification, when taken in connection with the accompanying drawings, which form a part thereof.

This invention relates to locks, and the primary object of the same is to provide a lock having night latch mechanism operative by a key and operative from the face of the lock for setting or dogging purposes only.

It is often desirable to make the release of the night latch mechanism, after it has been dogged, dependent on the use of a key, so that servants or employees will be unable to release the night latch mechanism of the door. At the same time, it is often desirable for a servant or employee to be able to dog the night latch mechanism when so instructed, without the use of a key, the key in the possession of the owner or occupant of the building being called into play only in connection with the release of the outer knob or other bolt retracting member. The lock embodying the present invention has been devised to meet these conditions.

With the foregoing and other objects in view, the invention consists in the novel features to be hereinafter described and claimed.

In the accompanying drawings, illustrative of one form of the invention, Figure 1 is an elevation of the lock with the cap plate removed showing the outer knob dogged; Fig. 2 is a similiar View, showing the night latch mechanism in its inoperative position; Fig. 3 is a fragmentary face view of the lock; Fig. 4 is a detail edge view of the key actuated slide; and Fig. 5 is a detail View of the bolt retracting lever.

Referring to the drawings, the case 10 of the lock, having the face plate 11, contains a spring protracted latch bolt 12 projecting through said face plate and controlled by a. yoke 13 adapted to be actuated by inner and outer roll-backs lat, 15, respectively. The latch bolt 12 is adapted to be retracted by means of a key through the intermediary of a bell crank or elbow lever 16 pivoted in the case at 17 and having a depending arm or branch 18 coacting with a cross-head 19 on the rear end of the latch bolt stem. The other arm or branch 20 of said lever 16 is Specification of Letters Patent.

Application filed January 29, 1912.

Patented Jan. 11,1916. Serial No. 674,040.

provided with a transverse enlargement 21 adapted to be contacted by a bit 22 of an outer cylinder lock screwed into the cap plate.

The night latch mechanism comprises a dogging slide 23 adapted to dog the outer roll-back 15 in the well-known manner. This slide has a head 24 projecting through the face plate 11 so that the slide 23 may be pushed in from the face of the lock to dog the outer knob. The release of the night latch mechanism, however, is dependent on the use of a key actuating a slide 25 guided laterally in the case and connected by means of an extension 26 with an intermediately pivoted walking beam or connecting lever 27 connected at the opposite side of its pivot or fulcrum with the slide 23. The slide 25 is guided laterally in the case by means of a projection 28 on the latter coacting with a bifurcated or forked portion 29 on said slide, and by suitable guides 30, 31, cooperating w th the extension 26. At the extremity of said extension the same carries a pin or projection 32 engaging a slot 33 in the upper end of the connecting lever 27.

The slide 25 is provided at its upper portion with an upwardly directed extension or bit at adapted to be contacted on either side by the short bit 35 of an inner cylinder lock 36 in line with the outer cylinder lock previously mentioned having the bit The inside bit 35 is considerably shorter than the bit 22 and will not strike the extremity 21 of the latch bolt retracting lever. Therefore the bit 35 when rotated in one direction will contact the bit 34: on the slide 25 at one side, shifting said slide in one direction, and if the bit 35 is rotated in the opposite direction it will contact with the opposite side of the extension or bit 34 and thereby shift the slide 25 in a direction opposite to that first mentioned. Hence, the slide 25 is movable positively in both directions by a key inserted at the inside of the door, and the movements of said slide will result in opposite movements of the dogging slide 23 to dog or release the outer roll-back.

It is intended that the same key which is used in connection with the outside cylinder lock to retract the bolt should be adapted to the inside cylinder lock 36, so that said key will not only retract the bolt from the outside but will also operate the night latch mechanism in either direction from the inside. It is further intended that the night latch mechanism should be movable from its inoperative into its operative position by the actuation by the key from the outside cylinder lock having the bit 22.

It will be observed that when the bit 22 is shifted in one direction it will strike the latch bolt lever 16 and be prevented from passing on to the bit or extension on the slide 25, but if said bit is rotated in the opposite direction it Will be possible for it to strike the bit or extension of the aforesaid slide in such a direction as to shift the dogging slide into dogging position. It Will be understood, however, that the use of the same key in both cylinder locks, and the actuation of the key operative slide from both sides of the door are not essential to all aspects of the invention.

It will also be understood that I have not attempted to illustrate and describe the numerous modifications of the lock structure Which may be adopted Within the scope of my invention.

lVhat I claim is '1. In a lock, night latch mechanism manually operable from the exterior of the lock in one direction only, and means for operatng said night latch mechanism in the other direction by a key; substantially as described.

52. In a lock, having a face plate, a latch bolt, and manually operable means for retracting the latch bolt, the combination of night latch mechanism, manually operable from the face of the lock in one direction only, and means for operating said night latch mechanism in the other direction by a key; substantially as described.

3. In a lock, the combination of a latch bolt, manual retracting means therefor, nigl'it latch mechanism manually operable from the exterior of the lock solely in such a direction as to dog said retracting means, and a key for releasing said night latch mechanism; substantially as described.

4. In a lock, the combination of a case having a face plate, a latch bolt projecting through said face plate, manual retracting means for said bolt, night latch mechanism manually operable from the face plate, only in such a direction as to dog said retracting means, and a key for releasing said retracting means from said night latch mechanism; substantially as described.

5. In a lock, the combination of a latch bolt, retracting means therefor, night latch mechanism associated with said retracting means, and movable into dogging position from the face of the lock, and means for releasing said night latch mechanism only by a key inserted at the inside of the door; substantially as described.

6. Ina lock, the combination of alatch bolt, retracting means therefor, night latch mechanism for doggingsaid means, means accessible at the face of the lock for moving said night latch mechanism into dogging position, and a key for moving said night latch mechanism into dogging position, said night latch mechanism being releasable from dogging position by said key only; substantially as described.

7. In a lock, the combination of a latch bolt, retracting means therefor, night latch mechanism for dogging said means, means accessible at the face of the lock for moving said night latch mechanism into dogging position, and means for moving said night latch mechanism into dogging position by a key inserted at either side of the door, said night latch mechanism being releasable only by means of said key; substantially as described.

8. In a lock, a latch bolt, retracting means therefor, night latch mechanism comprising a slide projecting through the face of'the lock, and adapted When in its inmost position to dog said retracting means, and means to move said slide to its releasing position, operable only by means of a key; substantially as described.

9. In a lock, a latch bolt, retracting means including a rollback, a slide for dogging said rollback, said slide being movable into dogging position by hand from the face of the lock, and key mechanism for moving the slide into dogging position from either side of the lock, said slide being releasable from dogging position only by a key inserted at one side of the lock; substantially as described.

10. In a lock, the combination of a bolt, ret acting means therefor, night latch mechanism, and key mechanism for moving said night latch mechanism into dogging position from either side of the lock, said night latch mechanism being releasable by a key inserted into the lock from one side only; substantially as described,

11. In a lock, the combination of a bolt, retracting mechanism therefor, night latch mechanism movable manually into do ging position from the edge of the door, and key mechanism for moving said night latch mechanism into dogging position from one side of the door, and for moving it into inoperative position from the opposite side only; substantially as described.

In Witness whereof, I have hereunto set my hand on the 27th day of January, 1912.

JOHN H. SHAW.

Witnesses:

SYDNEY F. SARGENT, BERTHA RAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

